Ball-bearing spindle



Jan 6, 1931.

J. v. M. RlsBERG BALL BEARING SPINDLE Filed Jan. 12, 1928 Patented Jan.Y6;` 1931 Unirse STATES PATENT-OFFICEI u JOHANNES vALnnMAiti/LRTENarsenite, OFSODERTELJE, SWEDEN, -Assienon To l AKTIEBOLAGET BALTic; OFSTOCKHOLM, SWEDEN BALL-BEARING SPINDLE Application Yfiled January 12,1928Sera1 No. *2l/46,324,V and.` in Canada April 25,1527.

ings', especially at the neck-bearing, supporting the spindleA at its`topend7` againstvthe entering of milk', watery and the like is met.

Tlienieans generally n`sed for effecting a tight jointbetween a rotatingshaft andthe stationary member' oi. its bearing and consisting of feltor the like lwould not be e'iifec-` tive.' .Qwing to the great speed ofvthe spindle the felt; wouldj be worn out veryrapidly. Another method ofprotectingv the ball-bear ing against foreign matters and'consistng infilling the bearing with grease cannot be used owing,` tothe great speedof thewspindle, which permits onlytheuse of light oil @for l the`lubricating of theball-bearing Hherein pensable condition for proiitingquestion. f y e. i Owing to the fact, however, that an indis- Vvantagesof ball-bearings or, on the whole,

for applying the same at all, consists' in that the bearing isprotectedlagainst the ei'itering' f into the saine lof' ioreignmatters andespecially moisture, which would cause the balls to rust, a fullysatisfactorysolution of `the problem of using ball-bearings for thesepas rater/members in question is not possible, witlioutthe saidcondition beix'lginlfilled, Thisis ei'lected by rendering thebowlspindle sleeve-shaped andinounting .the ballbearings inside thesame. This arrange'- ment is applicable especially to centrifugal inwhich the driving de-` liquid separators, Y vice comprisesa worin-wheelVmeshing;` screw threads on the bowl-spindle. 1

Thepresent invention relates to arrangef ments of the spindle, theball-bearings and members appertaining` to the same through which -manyadvantagesfare gained, which will-be stated after theconstruction of`the spindle has been described'. l Y In the accompanying` drawing,`Fig.l ,l

with

' shows in a vertical sect-ion a .form Oi execiition of the invention;the said figure shows thespindle mounted' in a crearn separator, theframe of which iszshown'in vertical section, while the bowl is shown inaside View, vpartially in' section.4 l1`1g-2y shows in a verby the ad-ytical sectiona spindle arranged in accordance with a second form ,of theinvention. '1.

kIn the formkoftlie invention shown yin Fig. 1, thegbowl spindleconsists of a stationary y carrier spindlel, fixed in lthe frame 2 ofthe separator,anda` ruiming spindle coinprisinv an outer sleeve 3 and aninner sleeve 4 slid into the sleeve 3 and Vfitting closely to the same.'lhexouter sleeve is extendedk downwards and provided with screw-threads5 engagedby the ordinary worm-wheel 6,v which in theshown separatorrotates in an oilbath contained in a pit provided inthe frame 2 of theseparator. Motive power isvtransinitted to the said worm-wheel 6 inanysuitable man? ner. Theinner sleeve 4 iseXtendedupwa-rds andconstitutes ajournal 7 carrying the sepa,- rator bowl 8. i 'lrheruining'spindle 8', 4 is Journalled in two ball-bearingsywhich areinountednvonthe central carrierfspindle .1. i

The dimensions of the-carrierspindle l may beso adapted, that thevibrations oi the bowl .8 and the runningespindle yare absorbed by i xthe carrier spindle itself7 or thefcarrier spin- Y ldie and theinountingof saine may be so ar-v ranged, thatthe said vibrations' areabsorbed partly bythe spring'y spindle 1v and partly by a springyconnection oi the spindle 1 with" thejframe of the separator, effectedpreterably byj a special, suitably adaptedplay between the spindle l andthe sleeve shapedpart 9 of the frame, in which the spindle is mounted7said part being filled with oil. The inner ball race 10 of theolowerball-bearing is' vforced on the spindle l and supported by a .flangellprovided `on .the saine. The Outer ball-.race 12'-y Of thesaidball-bearinguis located between an oii'set13, provided in" the outersleeve k3, and thev lower end of the innersleeve 4. The inner ballr race14 of the upper ball-bearing is supported by an offset 15 provided onthe ktop end of the carrier spindle 1, l.while theouter ball-race 16 ofthe said bearing bears against theinner side of the inner 'sleeve y4. AAscrew-threaded rin T 17 'meshes with screw-threads provided onbthe topend of the outersleeve 3 andengages the inner sleeve 4 by means of aninner flange 18 thus locking the inner sleeve 4in the outerZ sleeve 3. Apin 19 ylined in the sleeve 4 and extending through an axial slot in thesleeve 3 connects the sleeves, so that the driving power is transmittedfrom the sleeve 3 to the sleeve' 4 and the bowl S-connected to thesleeve 4 by a cross pin 20.

In the bottom wall of the sleeve 3 va 'circu-l lar groove 21 isprovided, which serves as a magazine, in' which lubricating roil fromthe ball-bearings is gathered,fasthe separator is brought to astandstill. the separato'iand the running spindle 3', 4are againrotated5'oil contained in the groove 21 is caused centrifugal force toenterV the lower ballbearing` 1'0, 12by which it is then minutely di- Vvided and spread as a line dust insidethe sleeve 4,theupper-ball-bearing 14,16 being thus also lubricated. Y

. In the form of the spindle.showlringFig. 2,

which is adaptedv to greater'creamseparators a sleeve 22r is slid intoVa' sleeve 23 in theV same manner. as inA 1', and the llower extended Yend o-theout'er sleeve'fconstit'utes a screw 24 i along thespindle26.130 the Vicinity oftheup'.-Y 'per ballbearing forthe purpose statedbe-l adapted to be engaged :by a driving. worm- Y wheel, whiletheextended upperend of the inner sleeve 22 constitutesv a journal-for thej separator-bowl in the same manner asin Fig, l. Also in this form ofexecution two ball-A bearings .are provided between .the running spindle22, 23 andthe carrier spindle 26.' The carrier spindle26 is adapted tobe fixed in the frame of the separator inthe same man- -ner as Vthespindle 1, Fig. The' inner ballrace 270i the lower bearing is-heldbetween an: offset 28 onthe carrier 'spindle`26 and a sleeve 29in'sc'rew-threaded engagement with thespindle 26.Sleeve'29 extendsupwards Y-low The inner ball-race 30 of th'e'upper ball-bearing is heldbetween an onsetl 31 onV Y the spindle 26 and a nut 32 screwed on thetop f of the carrier spindle 26., Between the lower l Y 40.is fixed inthe sleeve 22 and the head of the j endfo'fthe inner sleeve 22Yand' theouter ballrace 33.0f the lowerballbe'aring a spiral Vspring 34. islocated, and Abetween-the outer Vballfrace 3510i the upperball-bearingand the inner sleeve 22 a second spiral spring 36 is.

provided. A screw-threaded ring 37 meshing with theouter sleeve23ande'ngaging the inner sleeve 22 by means of an inner flange 38 preventsthe inner sleeve acted upon by` the springs .34 and 36 from leaving`thefo'uter sleeve. Inthe bottom ofthe sleeve 23 a circular Agroove 39Vfor lubricating oil is providedy and the lubrication'of theball-bearingsis effected inthe same manner` as in the construction illustrated inFig. 1. A screw said screw isin engagement withan axial slot 41,provided in the sleeve 23, and 'trans'- Vmits the motion of the sleevelast mentioned to theV sleeve 22and the bowl lin 'the saine 'manner asthe pin L19, Eig. 1. Y

:As perceived from the Adrawing the' bowl'- spindle, 'comprising the`stationarycarrier spindle and the running spindle constitutes apractically hermetically closed chamber, in which the ball-bearings areprotected against Waste milk and water and against oil contained in thepit `and spread in the saine by the rotatingfwor'mfwheel 6. The saido'ilwhen used for a longer period, will `be mixed with small particles wornfrom the worm-wheel, and often also with milk water, which, hasenteredthe said pit frointh'e cup shapedp'art' of the separator framevenclosing the bowl 8, which oil for that reason would be very injuriousto the ball-bearings. Also the lubricating oil provvided in the saidclosed chamber is protected against ldirt and prevented from leaving thechamber. For that reason the consumption of oil forlubricatingtlieballfbearings is reduced to a minimum, and'V experimentshave lproved that a separator-provided with a bowlispindle j arranged inaccordance' with the present invention maybe'run for years `vwithout-anyfresh oilbeing supplied. The

strain at the great nuinberof'reafolutionsV (600049000 --per minute), atwhich cream separators' V*generally are]rotated. 11n the spindle shownin Fig. 1 the lower ball-bear ing is adapted to sustain the whole weight'of the separator bowl?, while the Vupper ball'- bearing only serves tosustain the running spindleradially. In the form of execution f shown'in' Fig. 2 the weight of the bowl is distributed on both ball-bearings,the axial pressuiebeing transmitted to the outer ball races 33 and 35 bythe springs34 and 36,

' so that 'the' bowl issn'pportled in va yieldableV manner, the yieldingmovement vbeing liinited-downwardsby the sleeve 2 9. About of the Wholeload is sustained by the lower balllbearing and 1/3 of the load by theupper bearing yin accordance with the strength of the springs.Y Throughthe distribution of the load Yon vbothballfb'ea'ring's, bearings of'sinaller'size maybe used, the 'oiutler dia-uieter of theA runningspindle being thereby correspondingly reduced.' The ball-bearings .shownin :the drawings are to be preferred to suchaxially'acting'ballb'earii'i-g's as consistV ofjballs located between twofp'aralleldiscs, perpendicular to the spindle. Ballb'e'arings of this constructionare able to sustain Vvery great axial loads but have proved l. In aball-bearing spindle for centrifugal separator bowls the combination ofacentral' stationary carrier spindle and a running spindle enclosing thesame and comprising two sleeves one slid into the other and connected tothe same, one of the said sleeves being arranged tok transmit motion tothe ruiming spindle and the other sleeve arranged to carry the bowl.

2. In a ball-bearing spindle for centrifugal separator bowls thecombination of a central stationary carrier spindle, a ruiming spindleenclosing the same and comprising two conj nected sleeves one slid intothe other, means provided on one4 of the sleeves vfor transmittingmotion to the running spindle, an axial extension of the other sleevearranged to carry the bowl, and radially and axially acting ballbearings located between the carrier spindle and the running spindle andsustaining the latter.

3. In a ball-bearing spindle for centrifugal s separator bowls thecombination of afstationary carrier spindle, a running spindle,

comprising anl inner sleeveY and anvouter sleeve slidably connected,means providedon one of the sleeves for transmitting motion to therunning spindle, an axial extension of the other sleeve, arranged tocarry the bowl, i radially and axially acting ball bearings lo-` catedbetween the carrier spindle and the running spindle and sustaining thelatter, and

yielding means supporting the bowl carrying sleeve.

el. In a ball-bearing spindle for centrifugal separator bowls thecombination of a stationary carrier spindle, a ruiming spindle,comprising two sleeves one slid into the other and connected to thesame, means provided on one of the sleeves for transmitting drivingpower to the running spindle, an axial extension of theother sleeve,arranged to carry the bowl, radially and axially acting ballbearingslocated between the carrier spindle and the running spindle andsustaining the latter, springs provided between the bowl carrying sleeveand the ball-bearings and an abutment limiting the yielding downward fmovement of the sleeve last mentioned. p

5. In a ball-bearing spindle for centrifugal separator bowls thecombination of a central stationary carrier spindle and a runningspindle enclosing the same and comprising two connected sleeves one slidinto the other, one of the said sleeves being arranged to transmitlmotion to the runningsleeve and the other sleeve arranged to supportthe bowl, and a groove provided in the bottom of thekrunning sleeve andserving as amagazine for lubricating oil for the ball-bearings whileYthe separator is at a standstill.

e In testimony whereof I have hereunto affixed mysignature..

i JOHANNES VALDMAR MRTEN RISBERG.

